OALib Journal期刊
ISSN: 2333-9721
费用：99美元

投递稿件

查看量	下载量

相关文章
更多...

地球学报 2002

断层周围的弹塑性区及其地质意义

武红岭,张利容

Keywords: 断层,非线性本构关系,塑性区,有效应力,屈服应力

Full-Text Cite this paper Add to My Lib

Abstract:

采用弹塑性有限单元方法,通过模拟符合实际状况的逐步加载过程所引起应力场和塑性形变区的研究,得出如下结果:①在塑性或韧性剪切形变情况下,断裂或形变带的共轭剪切角往往大于45°;②在双向挤压应力条件下,先存断裂的前缘部位没有拉伸应力存在,但可能有伸展形变发生;③与最大主压应力夹角为30°～90°的断层前缘是偏应力的优势方位,容易发生塑性剪切形变,特别是夹角为60°左右的断层是最易发生新的构造活动的断层;④多数断层两侧一定范围内以及断层内部是相对的低应力区。这些应力的低值区,非常有利于矿液和油气的运移、聚集和成藏。

References

[1]	Wang Lianjie;Cui junwen;Wu Hongling,Lithosphere tectonic stress field in northern boundary in Qinghai-Tibet plateau,北京:冶金工业出版社,1988.
[2]	Wan Tianfeng,Paleotectonic stress field,北京:地质出版社,1988.
[3]	武红岭,张性结构面的力学性质与主应力关系解析,地质论评,1999(05).
[4]	王连捷;崔军文;武红岭,青藏高原北缘岩石圈构造应力场,北京:冶金工业出版社,1998.
[5]	万天丰,古构造应力场,北京:地质出版社,1988.
[6]	Wu Hongling;Wang Xiaofeng;Ma Yinsheng,Theory and method of studying hydrocarbon migration driven by tectonic stress field,石油学报,1999(05).
[7]	Ramsay J G,Shear zone geometry:a review,Journal of Structural Geology,1980(02).
[8]	Ren Wang;Hongling Wu,Displacement and stress fields due to non-uniform slip along a strike slip fault,Pure and Applied Geophysics,1983(04).
[9]	LEE J S,An introduction of Geomechanics,北京:科学出版社,1973.
[10]	李四光,地质力学概论,北京:科学出版社,1973.
[11]	Wang Ren;Xong Zhuhua;Huang Wenbin,Foundational theory of plasticity,北京:科学出版社,1982.
[12]	Anderson E M,The dynamics of faulting,Oliver and Boyd,E-dinburgh,2nd ed,1951.
[13]	赵永红;黄杰藩;王仁,岩石细观破裂的实验观测研究及其对了解地震活动性的启示,地球物理学报,1995(05).
[14]	武红岭;王小凤;马寅生,油田构造应力场驱动油气运移的理论和方法研究,石油学报,1999(05).
[15]	武红岭,走滑断层周围的应力场与断裂的等间距现象,北京:地震出版社,1993.
[16]	王仁;熊祝华;黄文斌,塑性力学基础,北京:科学出版社,1982.
[17]	Zhao Yonghong;Huang Jiepan;WANG Ren,An experimental observation on rock\'s micro-failure and its implication on understanding seismic activity,地球物理学报,1995(05).
[18]	Wu Hongling,Analysis on mechanical properties of a tensile structure plane and its relationship to principal stresses,地质论评,1999(05).
[19]	Wu Hongling,Stress field along a strike slip fault and phenomenon of equalspace of faults,北京:地震出版社,1993.
[20]	Chinnery M A,The stress changes that accompany strike-slip faulting,Bulletin of The Seismological Society of America,1963(05).

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133